"Deep Blood" (吸血殺し (ディープブラッド) Dīpu Buraddo?, lit. "Vampire Killer") is the ninth episode of the Toaru Majutsu no Index anime series and the last episode of the Deep Blood Arc. It was first broadcasted on November 29, 2008, with Nakatsu Tamaki as the storyboarder and episode director, while the script is written by Minikami Seishi.